Hood for discharge-pipes of gas-generators.



PATENTED AUG. 27, 1907.

A. DAVIS. HOOD FOR DISCHARGE PIPES 0F GAS GENERATQRS.

APPLICATION FILED JUNIN. 1906,

NITD STATES 1"AIENTv OFFICE.

AUGUSTINE DAVIS, OF CHICAGO, ILLINOIS, ASSIGNOR TO DAVIS ACETYLENE COMPANY, OF ELKHART, INDIANA, A CORPORATION OF 'SOUTH DAKOTA.

HOOD FOR DISCHARGE-PIPES OF GAS-GENERATORS.

Specification of Letters Patent.

Patented Aug. 27, 1907.

Application filed June 4,106. Serial No. 320,060.

To all whom t may concern:

Be it known that I, AUGUSTINE DAvis, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Hoods for the Discharge-Pipes of Gas-Generators, of which the following is a specification.

My invention relates to an improved hood detachably secured to the end of the discharge pipe of a gas generator, and is intended more particularly for use in acetylene generators of the character set forth in my Patent, No. 719,091, granted January 27, 1903. It has been found that hoods of this typebecome gummed up or fouled after having been in use some time; and it is not only desirable, but quite necessary that they be cleaned occasionally. In order to accomplish this readily and easily I have invented such a hood which can be quickly removed from the discharge pipe to be cleaned and as readily replaced.

In the accompanying drawings, which form a part of this specification, and wherein like reference characters refer to the same parts throughout,-Figure 1 is a side view of such a hood attached to the end of the gas discharge pipe; Fig. 2 is a central longitudinal section of the construction illustrated in Fig. l; and Fig. 3 is a bottom plan view of the same.

The hood comprises a metallic casing 10 preferably fiattened as illustrated, open at its bottom end, and provided at its top end with a plurality of minute perforations 11. Within this outer member 10 is a smaller inner hood l2 of similar cross-section, but of smaller dimensions. Hood 12 is preferably secured to the outer hood, as illustrated4 in Fig. 2, by means of solder, and is closed at its upper end and provided at its lower end with a perforated band or petticoat 13. Fastened to and projecting downwardly through the open mouth of hood 10 is a split cylindrical tube 14 soldered to hood 10 and provided along its split edges with a pair of outwardly extended flanges 15 apertured at 16 to receive a bolt or screw 17 so that this tubular extension may be securely fastened to and encircle the upper end of a gas pipe 18, conducting the acetylene gas from the generator.

When in the machine for generating gas, the hoods 10 and l2 are immersed in water to a height approximately that indicated by the line 19-19, so that a water-seal is secured. The gas, rising through the pipe 18, passes into the chamber or hood l2, displacing the I Water therein by forcing it downwardly out of its lower open mouth and then the gas passes through the numerous perforations in the sleeve or petticoat 13, bubbling up through the water between the two hoods and eventually passingoff to the gas reservoir or bell through the minute perforations 1'1 in the top of hood 10.. By using a construction of this character, fluctuations in the generation oi gas and the differences in pressure are not communicated to any extent to the mass of gas in the reservoir or bell. It will be apparent that by removing or loosening the bolt 1'7, thereby releasing the grasp of the tubular extension 14 upon the end of pipe 18, the combined hoods may be pushed upwardly and removed from the pipe, so that they may be cleaned. In order to replace the hoods the eX- tension 13 is merely held upon the pipe, the bolts I7 tightened, and the parts are then firmly held in place.

The construction described not only permits the hood to be readily removed for cleaning or other purposes without necessitating the removal of the gas discharge pipe 18, but it also permits the adjustment of the hood on said pipe so as to bring the water level in the hood at any desired height. Heretofore, so far as I am aware, hoods of this character have been permanently secured to the gas discharge pipe, thus'rendering adjustability of the hood impossible and necessitating considerable labor and trouble ingetting at the hood for cleaning purposes.

To those skilled in the art it will be apparent that minor mechanical changes may be made in the structure herein illustrated and described without departing from the substance oi my invention or sacrificing any of its advantages.

I claim:

1. In a device of the character described, the combina tion of `a discharge gas pipe, a perforated hood fitted to the end of said discharge pipe, said hood having a split extension encircling the end of said pipe, and means to clamp said split extension to said pipe, substantially as described.

2. In a device of the character described, the combination of a discharge gas pipe, a perforated hood fitted to one end of said pipe, said hood having a split extension encirclingl the end of said pipe, said extension having outwardly extended anges along the edges of its split portion, and a clamping bolt passing through apertures in said anges to cause said extension to grasp said pipe to retain said extension and hood in position thereon, sub- 

